Mechanism for actuating motor clutches in motor vehicles



Dec. 21 1926.

K. MAYBACH MECHANISM FOR ACTUATING MOTOR CLUTCHES IN MOTOR VEHICLES Filed Jan. 23, 1925 jr wzen/ar' Patented Dec. 21, 1926.

KARL MAYBACH, or rninnnicnsrmrnn, Bonnnsnn. GERMANY,

TES.

q masts PATENT OFFICE.

nssrenon 'ro Mar 7 BODENSEE, GERMANY.

MECHANISM FOR ACTUATING MOTOR QLUTCHJES IN MOTOR VEHICLES.

Application filed January 23, 1925, Serial No. 4264f, and in Germany February 4, 1924.

The invention relates to improvements in mechanisms for actuating clutch in motor vehicles, 1. e. situated between the motor mission gear of th the motor .the clutch and the trans- The inventive e vehicle.

mechanisms are adapted to facilitate the con trolling action when the vehicle starts sions as usual,

to start the vehicle in a direct manner 1. e. without theuse of several steps in the controlling especially desired t tion, all that for starting of the 1110 action and whereby it is o avoid'the free run posi the purpose that after tor the driver has not to actuate the motor clutch in any manner In employing the mechanisms according to my invention itis possible in a veh1c1e accomplished with a dimensions to sta shocks in such a manner starting machine of usual rt directly and free of that a special actuating of the motor clutch is avoided and that the starting action will not depend on the individual skill of the driver.

obtained in such a This is manner that the 'clutcln interposed between the motor and the driving shaft (Cardan shaft) which 'at stopping position of the motor shaft or the vehicle respectively automatically in tion by means is loosened, will be brought its closed and active posiof a special device which is not identical to controlling means actuated by muscular force.

vice is adapted to i the starting perio The said automatic de-' begin its action during d,.1n order to bring the motor shaft in driving connection with the gear of the vehicle before the full speed of the motor shaft is Such an automatic device 1 able in motor vehicles of the before, in which the starting machine sufficient power for direct vehicle. Here the advantageous ifthe vehicle has to start on extraordinary rising roads which the motoring is'often erto in this type of vehicles it essary to couple in the, usual the running motor sh reached. 's also -employkind as cited has starting of the inventive device is very or on roads on difiicult. -Hithwas also necmanner with aft during the stand-.

still of the vehicle in order to avoid an electric starting;

great dimenslons.

machine of unnecesary According to the invention the motor clutch may be actuated by pressure liquid the pressure of which is produced by means of a pump.

For the purpose to reach every desirable and smooth closing action of the motor clutch either a yielding -element can be brought in connection to the movable clutch member, or in the pressure liquid pipe there may be interposed a cylinder with a piston influenced by a spring so that the pressure of the liquid can only gradually reach its maximal amount here of the motor clutch are pressed each upon the other.

The figure of the accompanying drawing shows thesinventive mechanisms by way of example diagrammatically, partly in a sectional view. The parts are seen in plan.

(t denotes the motor of the vehicle and 5 an oil pressure pump which may be driven by the said motor. The pressure liquid is fed through the pipe 0 in the chamber d in which the oil will act upon, the movable coupling member 0 so that when it is pressed against the fly wheel f both the friction surfaces 6 and 7 respectively are coming into contact. r

The flywheel f is fixed to the motor shaft 9, while. the coupling member 6 is loosely keyed on the main shaft is of the gear h which latter stands in driving connection to the Cardan shaft (not shown in the drawing). The key is a usual feather o.

With the toothed rim f of the fly wheel gears the slidable pinion m of the starting machine n.

-Between the fly coupling member e located by which the loosening of the c utch is fully efiected after diminishing of the oil pressure. 1

Connected to the liquid piping c is the cylinder 12 with a piston 71 r is provided which acts upon the piston The working of the whole mechanism will be the following.

Whenthe starting machine is set in-function the slidable pinion m is brought from its position of rest dotted lines) wheel f and the .movabl e when the coupling meme.

the pressure sprin E is in it and a spring the motor has made some rev- K llti til)

olulions (for instance 5 or R. P. the motor driven pump 1) givcsthe liquid enough pressure for moving the coupling member 6 against the fiy wheel 7, i. e. the clutch will be closed. By means of the piston 2' actuated by the spring 9 the oil pressure Wlll be gradually increased till the pressure reaches its highest amount.

In further pursuance of the invention a yielding member may be interposed in the transmitting rod mechanism between the hydraulic means and the clutch whereby the advantage is obtained, that the clutch pres sure may only reach the highest amount after reaching the point of time at which any influence of the said yielding member is ceased.

ll do not Want to limit myself to the exact details described or shown in the drawing as many variations will occur to those-skilled in the art.

I claim:

l. A starting and coupling mechanism for motor vehicles comprising a motor, a clutch adapted to be automatically operated and means for coupling said.clutch, said means being adapted to operate automatically on the starting of said motor.

2. A starting and coupling mechanism for motor vehicles comprising a motor, a starting device for said motor, a clutch adapted to be automatically operated, and means for coupling said clutch, said means adapted to operate automatically on the starting of said motor.

3. A starting and coupling mechanism for motor vehicles comprising a motor, a starting device for said motor, a clutch adapted to be operated automatically, and means for coupling said clutch, said means being adapted to come into operation on the starting of said starting device.

42. A. starting and coupling mechanism for motor vehielescomprismg a motor, a device for starting said motor, a clutch adapted to be operated by liquid pressure, a pump adapted to create li uid pressure, a liquid in connection with said pump and with said clutch, said pump being in operative connection with said motor.

5. A starting and coupling mechanism for motor vehicles comprising a motor, a device for starting said motor, a clutch adapted to be operated by liquid pressure, a liquid in connection with said pump and with said clutch, said pump being adapted to be driven by said starting device.

re ns re the motor and adapted to cause the closing of the motor clutch as soon as the motor shaft, when started by the said starting machine, has completed some of its first revolutions.

'7. In a motor vehicle in combination a motor, a fly wheel fixed to the motor shaft, an electric starting machine the pinion of which can gear With the toothed rim of the fly Wheel, a transmission shaft being in driving connection with the gear of the vehicle, a motor clutch the one Which being fixed to the motor shaft While the other coupling member is losely keyed on the said transmission shaft, automatic means consisting in a pressure chamber joining to the said losely keyed coupling member, in a motor driven oilpump and in a pipe leading from the said oilpump to the said pressure chamber, the said automatic meam being adapted to cause the closing of the motor clutch as soon as the motor shaft, when started by the said starting machine, has completed some of its first revolutions.

8. In a .motor vehicle in combination a motor, a fly Wheel fixed to the motor shaft, an electric starting machine the pinion of Which can gear with the toothed rim of the fly Wheel, atransmission shaft being in driv-.

lng connection with the gear of the vehicle, a motor clutch the one coupling member of which being fixed to the motor shaft While the other coupling member is loosely keyed on the said transmission shaft, automatic meansconsisting in a pressure chamber joining to the said loosely keyed coupling, member, in a motor driven oilpump, in a connecting pipe and in a cylinder with a spring supported piston, the said automatic means being adapted to cause the gradual closing of the motor clutch as soon as the motor shaft, when started by the said starting machine, has completed some of its first revolutions.

In testimony whereof I aflix my signature.

KARL MAYBACH.

coupling member of U 

